post https://platform.uat.proveapis.com/v3/challenge
Send this request to submit challenge information. Either a DOB or last 4 of SSN needs to be submitted if neither was submitted to the /start endpoint (challenge fields submitted to this endpoint will overwrite the /start endpoint fields submitted). It will return a correlation ID, user information, and the next step to call in the flow. This capability is only available in Pre-Fill®, it's not available in Prove Identity®. You'll notice that when using Prove Identity®, if /validate is successful, it will then return v3-complete as one of the keys in the Next field map instead of v3-challenge.